package day03;

public class IfDemo {
    public static void main(String[] args) {
        double price = 400.0;
        if(price>=499){
            price *= 0.8;
        }
        System.out.println("price="+price);

        int score = 50;
        if(score>=0 && score<=100){
            System.out.println("成绩合法，成绩为："+score);
        }
    }
}
